| 摘要 |
PCT No. PCT/JP90/00240 Sec. 371 Date Oct. 26, 1990 Sec. 102(e) Date Oct. 26, 1990 PCT Filed Feb. 27, 1990 PCT Pub. No. W090/10080 PCT Pub. Date Jul. 9, 1990.The present invention concerns a process for producing nucleosides by carrying out the reaction of a base donor, a saccharide residue donor and a phosphoric acid donor by the use of an enzyme preparation containing nucleoside phosphorylase, thereby forming an N-glycosidic bond between the base moiety of the base donor and the saccharide moiety of the saccharide residue donor, which comprises using, as the enzyme preparation containing nucleoside phosphorylase, a preparation derived from the cells of one or more kinds of microorganisms belonging to thermophiles of the genus Bacillus and having high nucleoside phosphorylase activity per unit cell weight.
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